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2. The Emergency (India) - Wikipedia

   en.wikipedia.org/wiki/The_Emergency_(India)

   On the advice of Prime Minister Indira Gandhi, President Fakhruddin Ali Ahmed proclaimed a state of national emergency on 25 June 1975.. The Emergency in India was a 21-month period from 1975 to 1977 when Prime Minister Indira Gandhi had a state of emergency declared across the country by citing internal and external threats to the country.

3. Semiconductor - Wikipedia

   en.wikipedia.org/wiki/Semiconductor

   In a metal, every atom donates at least one free electron for conduction, thus 1 cm 3 of metal contains on the order of 10 22 free electrons, [28] whereas a 1 cm 3 sample of pure germanium at 20 °C contains about 4.2 × 10 22 atoms, but only 2.5 × 10 13 free electrons and 2.5 × 10 13 holes.

4. Infrared - Wikipedia

   en.wikipedia.org/wiki/Infrared

   Gamma ray: less than 10 pm: more than 30 EHz: more than 124 keV X-ray: 10 pm – 10 nm: 30 PHz – 30 EHz: 124 keV – 124 eV Ultraviolet: 10 nm – 400 nm: 750 THz – 30 PHz: 124 eV – 3.3 eV Visible: 400 nm – 700 nm: 430 THz – 750 THz: 3.3 eV – 1.7 eV Infrared: 700 nm – 1 mm: 300 GHz – 430 THz: 1.7 eV – 1.24 meV Microwave

5. Where to shop today's best sales: 25% off an iPad, 20% off ...

   www.aol.com/lifestyle/where-to-shop-todays-best...

   Target: Get up to 50% off select home items, 20% off select vacuums and more. Walmart : Get up to 65% off with flash deals on home goods, apparel and more. The reviews quoted above reflect the ...

6. Bangladesh - Wikipedia

   en.wikipedia.org/wiki/Bangladesh

   It has the largest off-grid solar power programme in the world, benefiting 20 million people. [197] An electric car called the Palki is being developed for production in the country. [198] Biogas is being used to produce organic fertilizer. [199] Bangladesh continues to have huge untapped reserves of natural gas, particularly in its maritime ...

7. X-ray fluorescence - Wikipedia

   en.wikipedia.org/wiki/X-ray_fluorescence

   X-ray generators in the range 20–60 kV are used, which allow excitation of a broad range of atoms. The continuous spectrum consists of " bremsstrahlung " radiation: radiation produced when high-energy electrons passing through the tube are progressively decelerated by the material of the tube anode (the "target").